Here's an interesting experiment, at least for news junkies. CBS is running a special prime-time edition of its CBS Evening News With Katie Couric (tonight, 8 ET/PT) in an attempt, the network says, to introduce more viewers to the broadcast. Considering the season she's having, from her influential pre-election interviews with Sarah Palin to her upcoming 60 Minutes sit-down with US Airways pilot "Sully" Sullenberger, you have to think Couric has earned the exposure.

After dazzling viewers with its character flashbacks and flash-forwards, Lost (season finale, tonight, 9 ET/PT) has shaken the space-time continuum this season by exploring the temporal variance between the island and the outside world.

When it comes to teaching physics, lab work is important. But don't forget the ukulele. That's a lesson professor Walter Smith has learned over the past few years at Haverford College, where he serenades students with songs about electronics and Einstein.

When lightning strikes an airliner in the sky there is little risk, although the lights might fail. But if it strikes immediately after landing the brakes may fail, an expert said in light of the Airbus crash in Toronto in a storm.